A reflex test of the knee is the basis for the term knee-jerk reaction.. A knee-jerk reaction is typically impulsive in nature and doesn't allow for someone to think things through. An outburst of anger is an example of a knee-jerk reaction.
As Figure 1 shows, the central processing unit consists of two parts: The control unit and the arithmetic/logic unit. Each part has a specific function. Before we discuss the control unit and the arithmetic/logic unit in detail, we need to consider data storage and its relationship to the central processing unit.
The Central Processing Unit, or CPU, is the brain of a computer. Without this vital component, the computer wouldn't be able perform any of the functions related to moving and processing data. With each new processor release from manufacturers (primarily AMD and Intel,) CPU become faster and more powerful.